Home / 31,819.01-43,905.08-18,387.86

Finding the Fourth Proportional to 31,819.01, 43,905.08 and 18,387.86

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Solution

The fourth proportional to 31,819.01, 43,905.08 and 18,387.86 is: 25,372.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,819.01 : 43,905.08 = 18,387.86 : x
  2. Step 2: Convert to fraction form
    31,819.01/43,905.08 = 18,387.86/x
  3. Step 3: Cross multiply
    31,819.01x = 43,905.08 × 18,387.86
  4. Step 4: Simplify right side
    31,819.01x = 807,320,290.77
  5. Step 5: Solve for x
    x = 807,320,290.77/31,819.01
  6. Step 6: Final answer
    x = 25,372.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.